CN213298434U - Pneumatic control overload protection module - Google Patents

Abstract

The utility model discloses a pneumatic control overload protection module relates to pneumatic equipment's application, includes overload protection valve body, overload valve gap, overload valve rod, overload valve top stopper, spring and overload valve piston. The utility model adopts an independent modular structure, and the overload protection function can be realized by connecting the overload valve piston upper air cavity, the overload valve piston lower air cavity and the overload signal air cavity with the matching main body, and a user can freely select whether to use, thereby greatly simplifying the structure of the matching main body, realizing a main body multipurpose, reducing the rejection rate and reducing the product cost; the overload protection function can be realized by combining the appropriate connection mode with other function control gas circuits, the application range is wide, the operation is simple, the practicability and the safety are high, and the device is suitable for large-scale production.

Description

Pneumatic control overload protection module

Technical Field

The utility model belongs to the technical field of pneumatic equipment's application and specifically relates to a pneumatic control overload protection module.

Background

Because of the excellent explosion-proof performance of pneumatic components, pneumatic control and pneumatic machinery are widely applied to various aspects of production and life. The pneumatic actuating elements such as the cylinder, the pneumatic motor and the like are important power units of the pneumatic machine, a reversing valve in an operation system of the pneumatic actuating element plays a crucial role in the aspects of the operating efficiency and the safety of the pneumatic machine, a common reversing valve only has the functions of air inlet and exhaust reversing and flow control in a certain sense, the actual operation function is poor, and the safety protection function is not provided, so that the great potential safety hazard exists, for example, the release speed under load is not easy to control, misoperation and operation blocking are easy to cause danger, the overload is not limited, and the overtime operation is realized.

For functional modules of overload protection type, no existing products are available on the market at present, and the functional modules can be used in combination with the reversing valve.

Disclosure of Invention

For solving the technical problem that above-mentioned exists, the utility model provides a pneumatic control overload protection module combines to use with supporting main part, can realize transshipping or superpressure protect function to the emergence of incident under the accident situation has improved the suitability and the security of the supporting main part of whole pneumatics.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

a pneumatic control overload protection module comprises an overload protection valve body, an overload valve cover, an overload valve rod, an overload valve top plug, a spring and an overload valve piston, wherein the overload valve cover is fixedly arranged at the bottom of the overload protection valve body, the overload valve rod is rotatably connected with the overload valve top plug, the bottom end of the overload valve rod penetrates through the overload valve cover and is arranged in a step mounting hole of the overload valve cover, the overload valve top plug is clamped in a transverse groove in the upper surface of the overload valve cover, when the overload valve rod is rotated, the overload valve top plug moves upwards or downwards, the overload valve piston is arranged at the top of an upper cavity of the overload protection valve body, above the overload valve top plug and the overload valve rod, the spring is arranged between the overload valve piston and the overload valve top plug, the bottom end of the spring is sleeved outside the overload valve top plug, the top end of the spring is fixed on the bottom surface of the overload valve piston and sleeved outside the, The overload protection valve comprises an overload valve piston lower air cavity and an overload signal air cavity, wherein a fabrication hole communicated with the overload valve piston upper air cavity is formed in one side of the overload valve piston upper air cavity on the overload protection valve body and is blocked by an inner hexagon screw.

Set up piston radial seal circle and piston end face seal circle between overload valve piston and the overload protection valve body respectively, set up valve rod seal circle between overload valve rod and the overload valve gap, set up the combination and seal up between overload valve gap and the overload protection valve body, it seals up to set up the connection when overload protection valve body is connected with supporting main part.

The utility model adopts an independent modular structure, and the overload protection function can be realized by connecting the overload valve piston upper air cavity, the overload valve piston lower air cavity and the overload signal air cavity with the matching main body, and a user can freely select whether to use, thereby greatly simplifying the structure of the matching main body, realizing a main body multipurpose, reducing the rejection rate and reducing the product cost; the overload protection function can be realized by combining the appropriate connection mode with other function control gas circuits, the application range is wide, the operation is simple, the practicability and the safety are high, and the device is suitable for large-scale production.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the pneumatic reversing valve of the present invention.

Detailed Description

The invention is described in detail below with reference to the following figures and specific embodiments:

as shown in fig. 1-2, the pneumatic control overload protection module includes an overload protection valve body 1, an overload valve cover 2, an overload valve rod 5, an overload valve top plug 8, a spring 11 and an overload valve piston 13, wherein the overload valve cover 2 is fixedly disposed at the bottom of the overload protection valve body 1, the overload valve rod 5 is rotatably connected with the overload valve top plug 8, the bottom end of the overload valve rod passes through the overload valve cover 2 and is disposed in a step mounting hole of the overload valve cover 2, the overload valve top plug 8 is clamped in a transverse groove on the upper surface of the overload valve cover 2, when the overload valve rod 5 is rotated, the overload valve top plug 8 moves upwards or downwards, the overload valve piston 13 is disposed at the top of an upper chamber of the overload protection valve body 1, above the overload valve top plug 8 and the overload valve rod 5, the spring 11 is disposed between the overload valve piston 13 and the overload valve top plug 8, and the bottom end of the spring 11 is, The top end of the overload protection valve body 1 is fixed on the bottom surface of an overload valve piston 13 and sleeved outside an overload valve rod 5, the overload protection valve body 1 is provided with an overload valve piston upper air cavity 15, an overload valve piston lower air cavity 17 and an overload signal air cavity 16, and one side of the overload valve piston upper air cavity 15 on the overload protection valve body 1 is provided with a fabrication hole communicated with the overload valve piston upper air cavity and blocked by an inner hexagon screw 18.

As a preferable mode, in this embodiment, a piston radial seal ring 9 and a piston end face seal ring 10 are respectively arranged between the overload valve piston 13 and the overload protection valve body 1, a valve rod seal ring 7 is arranged between the overload valve rod 5 and the overload valve cover 2, a combined seal gasket 6 is arranged between the overload valve cover 2 and the overload protection valve body 1, and a connecting seal gasket 12 is arranged when the overload protection valve body 1 is connected with the matching main body 14.

The utility model discloses in actual installation, overload valve piston 13, the outside of transshipping valve rod 5 all set up the annular that is used for placing corresponding sealing member, through 4 fixed connection of combination screw between overload valve gap 2 and the overload protection valve body 1, when being connected with corresponding supporting main part, adopt 3 fixed connection of connecting screw. The overload valve rod 5 is arranged in a step hole of the overload valve cover 2, so that the overload valve rod cannot move axially, the overload valve top plug 8 is clamped in a transverse groove of the overload valve cover 2 and cannot rotate, and the overload valve top plug 8 can be driven to move upwards or downwards when the overload valve rod 5 rotates, so that the pressure of the spring 11 on the overload valve piston 13 is adjusted, and the overload load is adjusted within a certain range.

The following description will illustrate the specific implementation process of the present invention by taking as an example the present invention applied to a reversing pneumatic valve capable of connecting an overload protection module to control a pneumatic motor.

Firstly, an upper air cavity 15 of an overload piston valve is communicated with a high-pressure cavity during load working, a lower air cavity 17 of the overload piston valve is communicated with an exhaust cavity during load working, and an overload signal air cavity 16 is connected with a control air path for controlling the connection and disconnection of a main air supply pipeline of a reversing pneumatic valve.

When the operation handle of the reversing pneumatic valve is pulled to enable the motor to work under the forward load (mechanical lifting, traction and the like), an exhaust channel of the pneumatic motor is communicated with an overload valve piston lower air cavity 17 of the overload protection module, an air inlet channel of the pneumatic motor is communicated with an overload valve piston upper air cavity 15 of the overload protection module, a valve rod sealing ring 7 and a piston radial sealing ring 9 enable the piston lower air cavity to form a closed space, due to the fact that the effective area of an upper air cavity of an overload valve piston 13 is small, under the combined action of the pneumatic motor exhaust back pressure and a spring 11, a piston end face sealing ring 10 on an overload valve top plug 8 is tightly attached to a conical surface of an overload protection valve body 1, the overload valve piston upper air cavity 15 cannot be communicated with an overload signal air cavity 16, and the pneumatic motor can normally work within the rated. When the load of the pneumatic motor is increased, the pressure of the air inlet channel is increased due to the increase of the resistance, when the pressure born by the upper cavity of the overload valve piston 13 is larger than the sum of the exhaust back pressure of the lower cavity of the overload valve piston 13 and the force generated by the spring 11, the overload piston 13 descends, the upper cavity 15 of the overload valve piston is communicated with the overload signal air cavity 16, the high-pressure gas signal is transmitted to a corresponding control air channel of an emergency stop protection module or other control systems, the main air inlet valve is closed or a corresponding emergency program is started, the pneumatic motor stops working, and normal operation can be carried out again only after the overload situation disappears and is started and recovered, so that the pneumatic motor is controlled to work normally.

When the operating handle of the novel reversing pneumatic valve is pushed to enable the pneumatic motor to work reversely without load (mechanical implementation is put down, release and the like), an exhaust channel of the pneumatic motor is communicated with an upper air cavity 15 of an overload valve piston, an air inlet channel of the pneumatic motor is communicated with a lower air cavity 17 of the overload valve piston, and because the thrust of a lower air cavity of the overload valve piston 13 is greater than the thrust of the upper air cavity of the overload valve piston 13, the upper air cavity 15 of the overload valve piston 13 cannot be communicated with an overload signal air cavity 16 all the time, the pneumatic motor can work normally.

The cooperation of overload valve gap 2 and overload valve top plug 8 is the wedge type cooperation, when the square pole head through overload valve rod 5 is rotatory, overload valve top plug 8 can not rotate in the wedge groove of overload valve gap 2, can reciprocate through the lifting or pulling effect of overload valve rod screw thread to compression or release spring 11, played and increased or reduced the effect to overload valve piston 13's pressure, made the overload protection module possess in certain extent overload load's regulatory function.

The overload protection valve body 1, the overload valve piston 13 and the piston end face sealing ring 10 form conical surface sealing, unreliable factors such as shearing and excessive deformation of the sealing ring and displacement of the sealing ring caused by small end face plane sealing are avoided, and the service life of the sealing ring and the sealing reliability are greatly improved.

In the embodiment, the connection size of the overload protection module is designed according to the relevant connection size of the reversing pneumatic valve applied to the overload protection module, so that the overload protection module is convenient to assemble and install, and can be applied to other pneumatic control systems needing load limitation through methods such as transition connection or structure enlargement or structure reduction according to actual requirements.

The overload protection module has simple structure and convenient installation, and the preassembly structural design simplifies the installation, debugging, maintenance and repair procedures of the module, greatly facilitates the production of products and the replacement and repair service of users, and ensures the reliability of the module assembly quality.

When the overload protection module is not needed to be installed, only channels such as the upper overload valve piston air cavity 15, the overload signal air cavity 16 and the lower overload valve piston air cavity 17 need to be communicated and sealed, other functions of an operation system are not affected, the selection space of a user for product functions is greatly expanded, and the applicability of products is improved.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.

Claims (2)

1. A pneumatic control overload protection module is characterized by comprising an overload protection valve body (1), an overload valve cover (2), an overload valve rod (5), an overload valve top plug (8), a spring (11) and an overload valve piston (13), wherein the overload valve cover (2) is fixedly arranged at the bottom of the overload protection valve body (1), the overload valve rod (5) is rotatably connected with the overload valve top plug (8), the bottom end of the overload valve top plug penetrates through the overload valve cover (2) and is arranged in a step mounting hole of the overload valve cover (2), the overload valve top plug (8) is clamped in a transverse groove in the upper surface of the overload valve cover (2), when the overload valve rod (5) is rotated, the overload valve top plug (8) moves upwards or downwards, the overload valve piston (13) is arranged at the top of an upper cavity of the overload protection valve body (1), the overload valve top plug (8) and above the overload valve rod (5), the overload protection valve is characterized in that the spring (11) is arranged between the overload valve piston (13) and the overload valve top plug (8), the bottom end of the spring (11) is sleeved outside the overload valve top plug (8), the top end of the spring is fixed on the bottom surface of the overload valve piston (13), and is sleeved outside the overload valve rod (5), the overload protection valve body (1) is provided with an overload valve piston upper air cavity (15), an overload valve piston lower air cavity (17) and an overload signal air cavity (16), one side of the overload valve piston upper air cavity (15) on the overload protection valve body (1) is provided with a fabrication hole communicated with the overload valve piston upper air cavity, and the process hole is blocked by an inner hexagonal screw (18).

2. The pneumatic control overload protection module according to claim 1, wherein a piston radial sealing ring (9) and a piston end surface sealing ring (10) are respectively arranged between the overload valve piston (13) and the overload protection valve body (1), a valve rod sealing ring (7) is arranged between the overload valve rod (5) and the overload valve cover (2), a combined sealing gasket (6) is arranged between the overload valve cover (2) and the overload protection valve body (1), and a connecting sealing gasket (12) is arranged when the overload protection valve body (1) is connected with a matched main body (14).

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